Appendix 273 



North American species north of Mexico 7 



New Bngland species 2 



Hoosac Valley species 2 



New England species : 



1. A. monophylla (LinuEeus) Green, 1753-1891. 



2. A. unifolia (Michaux) Rafinesque, 1803-1808. 



I.— ACHROANTHES MONOPHYIvLA (Linnaeus) Green, 

 1753-1891 



White Adder's-Mouth 



The specific name, monophylla, refers, inappropriately, to the 

 one leaf, since each of our New England species are i-leaved. 



Small woodland orchid, with bulbous root. June 2oth-July 

 25th- August 2d. 



Flowers whitish, in a club-like raceme, 1-3 inches long, ]i-y^ 

 inch thick ; flowers yV inch long, minute, pedicels nearly erect, 

 subtended by bracts ^ inch long. Labellum ovate, acuminate, 

 notched on sides. Sepals and petals acute, narrow. Stem, 4-6 

 inches high. Leaf, i, sheathing at its base, 1-2 inches long, dis- 

 tinguished from following species, A. unifolia^ by being near 

 base of stem instead of middle. 



Continental Range — From New Brunswick, Nova Scotia, 

 southward to Vermont, doubtfully reported for New Bedford, 

 Massachusetts ; westward to Oneida, New York, Pennsylvania, 

 Minnesota, Indiana, and Texas. 



New England Range— MdiinQ, infrequent ; New Hampshire, 

 rare; Vermont, Pownal, Swamp of Oracles (Marcus White), 

 rare; Massachusetts, Berlin, and Spencer (Dr. G. E. Stone); 

 Mount Grey lock bog, North Adams (Marcus White), rare. 



2.— ACHROANTHES UNIFOLIA (Michaux) Rafinesque, 



1803-1808 



Green Adder' s-Mouth 



The specific name, unifolia, one-leaved, refers, like the pre- 

 ceding species, to the i leaf. 



Small damp woodland orchid, with bulbous root. May-June 

 26th (South)-July 25th- August loth-September (North). 



Flowers in club-shaped raceme 1-3 inches long, i inch thick ; 

 greenish, minute. yV i^ch long, pedicels slender, spreading, %- 

 Yz inch long. Labellum broad, 3-toothed at apex. Sepals 

 oblong. Stem, 4-10 inches high. Leaf, i, near the middle of 

 stem, clasping, nearly orbicular. Seed-capsule oval, drooping. 



